4031491 has 2 divisors, whose sum is σ = 4031492. Its totient is φ = 4031490.

The previous prime is 4031473. The next prime is 4031497. The reversal of 4031491 is 1941304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4031491 - 2⁹ = 4030979 is a prime.

It is not a weakly prime, because it can be changed into another prime (4031497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015745 + 2015746.

It is an arithmetic number, because the mean of its divisors is an integer number (2015746).

Almost surely, 2^4031491 is an apocalyptic number.

4031491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4031491 is an equidigital number, since it uses as much as digits as its factorization.

4031491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 4031491 is about 2007.8573156477. The cubic root of 4031491 is about 159.1555904807.

Adding to 4031491 its reverse (1941304), we get a palindrome (5972795).

The spelling of 4031491 in words is "four million, thirty-one thousand, four hundred ninety-one".